Home / 20,638.40-28,476.26-11,683.95

Finding the Fourth Proportional to 20,638.40, 28,476.26 and 11,683.95

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Solution

The fourth proportional to 20,638.40, 28,476.26 and 11,683.95 is: 16,121.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.40 : 28,476.26 = 11,683.95 : x
  2. Step 2: Convert to fraction form
    20,638.40/28,476.26 = 11,683.95/x
  3. Step 3: Cross multiply
    20,638.40x = 28,476.26 × 11,683.95
  4. Step 4: Simplify right side
    20,638.40x = 332,715,076.64
  5. Step 5: Solve for x
    x = 332,715,076.64/20,638.40
  6. Step 6: Final answer
    x = 16,121.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.